﻿#region License
/*
 * Copyright ©2011-2012 EasyMon Project
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *  
 */
#endregion

using System;
using System.Diagnostics;
using EasyMon.Common.Sources;
using EasyMon.Common.Values;
using EasyMon.Server.EasyMonWinAgent;

namespace EasyMon.Server.Extensions
{
    public static class MachineSourceExtensions
    {
        public static Func<string, IMachineAgent> AgentFactory { get; set; }

        static MachineSourceExtensions()
        {
            AgentFactory = address => new MachineAgentClient("WSHttpBinding_IMachineAgent", address);
        }

        public static MachineValue Query(this MachineSource source)
        {
            IMachineAgent agent = null;

            try
            {
                agent = AgentFactory(source.AgentAddress);

                var value = new MachineValue
                {
                    DisplayName = source.DisplayName,
                    Status = ValueStatus.Good,
                    Processes = agent.QueryProcesses(source.Processes)
                };

                value.SynchStatusWithChildren(value.Processes);

                return value;
            }
            catch (Exception e)
            {
                Trace.WriteLine(e.ToString());

                return new MachineValue
                {
                    DisplayName = source.DisplayName,
                    Status = ValueStatus.Unavailable,
                    Processes = new ProcessValue[0]
                };
            }
            finally
            {
                var disposable = agent as IDisposable;
                if (disposable != null)
                {
                    try
                    {
                        disposable.Dispose();
                    }
// ReSharper disable EmptyGeneralCatchClause
                    catch
// ReSharper restore EmptyGeneralCatchClause
                    {
                    }
                }
            }
        }
    }
}